power&rf 3-8 2005 winter economy type positive cmos ldo regulator ic ?` cmos ???` ic tk637xxb/h/s description the tk637xxb, the tk637xxh and the tk637xxs are low quiescent current cmos ldo regulator ics with on/off control. these ics has very low noise characteristics. therefor, the noise bypass capacitor is not required. the tk637xxb is packaged in a miniature 4-bump flip chip. the tk637xxh is packaged in a small son2017-6. the tk637xxs is packaged in sot23-5. they are suitable for small portable equipment with high- density mounting. these ics has very low quiescent current, very good transient and extra low dropout characteristics. the output voltage is available from 1.5 to 4.2v in 0.1v steps. tk637xxb/h/s ?M? cmos ???` ic ? tk637xxb ? 4 ????? fc-4 tk637xxh ????` son2017-6 tk637xxs ???` sot23-5 ? ??g???Cm? ??^?g?R? ?????@?? ?? ?R??? 1.5~4.2v 0.1v ???O ? features ? low quiescent current ? ? ? good transient performance ? ?^ ? very low dropout voltage ? ???g?R ? noise bypass capacitor not required ? ????? ? over current protection, over heat protection ? ^o^?o ? active high on/off control ? ??? on/off ?` ? high precision output voltage of 2.0% or 60mv ? ???R : 2.0% or 60mv applications ? portable equipment ? C package outline ordering information part name package marking pin configuration ordering information tk637xxb fc-4 dxx 6 t k x 3 7 x b c voltage code package code storage direction temperature range b: flip chip b: back type c: t a =25c b ex.2.5v: 25, 3.3v: 33 tk637xxh son2017-6 dxx tk637xxs sot23-5 dxx see next page 6 t k x 3 7 x c voltage code package code tape/reel code temperature range h:son2017-6, s: sot23-5 l:left type c: t a =25c l ex.2.5v: 25, 5.0v: 50 * ?xx? means voltage code. ?xx? ?R`???? absolute maximum ratings parameter ? symbol ? rating unit g remarks q operating voltage range ?R v op 2.0 to 6.0 v operating temperature range ?? t op -40 to +85 c power dissipation SM p d 360 mw board mount g?r
power&rf 2005 winter 3-9 electrical charcteristics v in =v out.typ +1v, v cont =1.3v, t a =t j =25 c value parameter ? symbol ? min typ max units g conditions line regulation linreg 0 4 mv ? v in =1v 624 tk637xxb, i out =5 to 50ma, v out =2.85v load regulation ?? loareg -- mv tk637xxh/si out =5 to 100ma 85 125 tk637xxb, v out =2.85v to, i out =50ma dropout voltage *1 g?R v drop -- mv tk637xxh/s, v out =2.85v to, i out =100ma maximum load current *2 i out.max 200 300 ma v out =v out.typ 0.9 quiescent current ? i q 10 20 a i out =0ma, v cont =v in standby current i stb 0.01 0.1 a v cont =0v gnd pin current o i gnd 25 50 a i out =50ma, v cont =v in 1.2 v out on state control voltage ?`?R v cont 0.2 v v otu off state output voltage / temp. ? v out / ? t a 100 ppm/c i out =5ma output noise voltage(tk63128) v noise 45 vrms c out =1.0f, i out =30ma, bpf=400hz to 80khz ripple rejection(tk63128) rr 65 db c oit =1.0f, i out =10ma , f=1khz *1: for v out 2.0v, no regulations. *2: the maximum output current is limited by power dissipation. block diagram thermal& over current protection on/off control v ref a2 a1 b2 b1 ? tk637xxb c out b1 b2 a2 tk637xxb a1 v in v out gnd v cont v out on off c in v in 1 3 6 4 2 5 thermal& over current protection on/off control v ref ? tk637xxh 6 1 2 tk637xxh 5 v in gnd gnd v cont on off c in v in 3 4 v out nc c out v out 1 3 5 4 thermal& over current protection on/off control v ref 2 ? tk637xxs 5 1 2 tk637xxs v in gnd v out on off c in v in 3 4 v cont nc c out v out
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